CRYSTAL-FIELD DEPENDENCE OF THE MAGNETIC LINEAR BIREFRINGENCE IN PARAMAGNETIC RARE-EARTH GARNETS N. P. Kolmakova, R. Z. Levitin, A. I. Popov, N. F. Vedernikov, A. K. Zvezdin and V. Nekvasil J. Phys. Colloques, 49 C8 (1988) C8-955-C8-956 DOI: 10.1051/jphyscol:19888436